This is exactly the question we hear a billion times every time somebody enquires about our email optimisation service. And the answer is always the same: no idea, just test it.
But unfortunately, for some really strange reason, that’s the point the conversation often ends. Testing sounds extremely complicated when in reality email tests are perhaps the easiest to implement, and the return you would normally get makes not just the initial test but any future tests cost effective. So today I will try to give you a detailed breakdown of email frequency tests, and eliminate any excuses from your vocabulary.